/*
* ======== txData ========
*/
static uint32_t txData(const uint8_t *pStr, uint32_t length)
{
unsigned long buffAvailSize;
uint32_t bufferedCount = 0;
uint32_t sendCount = 0;
uint8_t *sendPtr;
while (bufferedCount != length) {
/* Determine the buffer size available */
buffAvailSize = USBBufferSpaceAvailable(&txBuffer);
/* Determine how much needs to be sent */
if ((length - bufferedCount) > buffAvailSize) {
sendCount = buffAvailSize;
}
else {
sendCount = length - bufferedCount;
}
/* Adjust the pointer to the data */
sendPtr = (uint8_t *)pStr + bufferedCount;
/* Place the contents into the USB BUffer */
bufferedCount += USBBufferWrite(&txBuffer, sendPtr, sendCount);
}
return (bufferedCount);
}
//****************************************************************************
//
// This function will print out to the console UART and not the echo UART.
//
//****************************************************************************
void
CommandPrint(const char *pcStr)
{
int iIdx;
const char cCR = 0xd;
iIdx = 0;
while(pcStr[iIdx] != 0)
{
//
// Wait for space for two bytes in case there is a need to send out
// the line feed plus the carriage return.
//
while(USBBufferSpaceAvailable(&g_sTxBuffer) < 2)
{
}
//
// Print the next character.
//
USBBufferWrite(&g_sTxBuffer, (const unsigned char *)&pcStr[iIdx], 1);
//
// If this is a line feed then send a carriage return as well.
//
if(pcStr[iIdx] == 0xa)
{
USBBufferWrite(&g_sTxBuffer, (const unsigned char *)&cCR, 1);
}
iIdx++;
}
}
/******************************************************************************
* *
* \brief Read as many characters from the UART FIFO as we can and move the *
* into the CDC transmit buffer.\n *
* *
* \param none. *
* *
* \return UART error flags read during data reception. *
* *
******************************************************************************/
static int ReadUARTData(void)
{
int lChar, lErrors;
unsigned char ucChar;
unsigned int ulSpace;
/* Clear our error indicator. */
lErrors = 0;
/* How much space do we have in the buffer? */
ulSpace = USBBufferSpaceAvailable((tUSBBuffer *)&g_sTxBuffer);
/* Read data from the UART FIFO until there is none left or we run
out of space in our receive buffer.
*/
while(ulSpace && UARTCharsAvail(USB_UART_BASE))
{
/* Read a character from the UART FIFO into the ring buffer if no
errors are reported.
*/
lChar = UARTCharGetNonBlocking(USB_UART_BASE);
/* If the character did not contain any error notifications,
copy it to the output buffer.
*/
if(!(lChar & ~0xFF))
{
ucChar = (unsigned char)(lChar & 0xFF);
USBBufferWrite((tUSBBuffer *)&g_sTxBuffer,
(unsigned char *)&ucChar, 1);
/* Decrement the number of bytes we know the buffer can accept. */
ulSpace--;
}
else
{
/* Update our error accumulator. */
lErrors |= lChar;
}
/* Update our count of bytes received via the UART. */
g_ulUARTRxCount++;
}
/* Pass back the accumulated error indicators. */
return(lErrors);
}
//*****************************************************************************
//
// Read as many characters from the UART FIFO as possible and move them into
// the CDC transmit buffer.
//
// \return Returns UART error flags read during data reception.
//
//*****************************************************************************
static long
ReadUARTData(void)
{
long lChar, lErrors;
unsigned char ucChar;
unsigned long ulSpace;
//
// Clear the error indicator.
//
lErrors = 0;
//
// How much space is available in the buffer?
//
ulSpace = USBBufferSpaceAvailable(&g_sTxBuffer);
//
// Read data from the UART FIFO until there is none left or there is no
// more space in the receive buffer.
//
while(ulSpace && ROM_UARTCharsAvail(UART0_BASE))
{
//
// Read a character from the UART FIFO into the ring buffer if no
// errors are reported.
//
lChar = ROM_UARTCharGetNonBlocking(UART0_BASE);
//
// If the character did not contain any error notifications,
// copy it to the output buffer.
//
if(!(lChar & ~0xFF))
{
ucChar = (unsigned char)(lChar & 0xFF);
USBBufferWrite(&g_sTxBuffer, &ucChar, 1);
//
// Decrement the number of bytes the buffer can accept.
//
ulSpace--;
}
else
{
//
// Update the error accumulator.
//
lErrors |= lChar;
}
}
//
// Pass back the accumulated error indicators.
//
return(lErrors);
}
void USB_resetPacketAssembler(void){
g_ucReadMode = WAITING;
g_ulCharIndex = 0;
g_ulParamIndex = 0;
g_ulReceiveMode = REC_MODE_NORMAL;
#ifdef __DEBUG__
UARTprintf("\nTx Buffer Space Available = %d",USBBufferSpaceAvailable((tUSBBuffer *)&g_sTxBuffer));
UARTprintf("\nRx Buffer Space Available = %d",USBBufferSpaceAvailable((tUSBBuffer *)&g_sRxBuffer));
UARTprintf("\nCLEARING USB BUFFERS...");
#endif
USBBufferFlush((tUSBBuffer *)&g_sTxBuffer);
USBBufferFlush((tUSBBuffer *)&g_sRxBuffer);
#ifdef __DEBUG__
UARTprintf("\nTx Buffer Space Available = %d",USBBufferSpaceAvailable((tUSBBuffer *)&g_sTxBuffer));
UARTprintf("\nRx Buffer Space Available = %d",USBBufferSpaceAvailable((tUSBBuffer *)&g_sRxBuffer));
#endif
}
/************************************************************************************//**
** \brief Checks if there is still data left to transmit and if so submits it
** for transmission with the USB endpoint.
** \return none.
**
****************************************************************************************/
static void UsbTransmitPipeBulkIN(void)
{
tUSBRingBufObject txRing;
blt_int32u txSpace;
blt_int32u txWriteIdx;
blt_int8u nr_of_bytes_for_tx_endpoint;
blt_int8u byte_counter;
blt_int8u byte_value;
blt_bool result;
/* read how many bytes should be transmitted */
nr_of_bytes_for_tx_endpoint = UsbFifoMgrScan(fifoPipeBulkIN.handle);
/* only continue if there is actually data left to transmit */
if (nr_of_bytes_for_tx_endpoint == 0)
{
return;
}
/* get information about the USB transmit buffer */
USBBufferInfoGet(&g_sTxBuffer, &txRing);
/* determine how many bytes will still fit in the tx buffer */
txSpace = USBBufferSpaceAvailable(&g_sTxBuffer);
/* only transmit the amount of bytes that will fit in the tx buffer */
if (nr_of_bytes_for_tx_endpoint > txSpace)
{
nr_of_bytes_for_tx_endpoint = txSpace;
}
/* determine write index for the tx buffer */
txWriteIdx = txRing.ui32WriteIndex;
/* copy the transmit data to the transmit buffer */
for (byte_counter=0; byte_counter < nr_of_bytes_for_tx_endpoint; byte_counter++)
{
/* obtain data from the fifo */
result = UsbFifoMgrRead(fifoPipeBulkIN.handle, &byte_value);
ASSERT_RT(result == BLT_TRUE);
/* store it in the transmit buffer */
g_pui8USBTxBuffer[txWriteIdx] = byte_value;
/* increment index with wrapping */
txWriteIdx++;
if (txWriteIdx >= BULK_BUFFER_SIZE)
{
txWriteIdx = 0;
}
}
/* inform the usb library that new data are ready for transmission */
USBBufferDataWritten(&g_sTxBuffer, nr_of_bytes_for_tx_endpoint);
} /*** end of UsbTransmitPipeBulkIN ***/
/*
* ======== USBCDCD_LoggerIdle_sendData ========
*/
int USBCDCD_LoggerIdle_sendData(unsigned char *pStr, int length)
{
unsigned int bufAvailSize;
/* Determine the buffer size available and length to send */
bufAvailSize = USBBufferSpaceAvailable(&txBuffer);
if (!bufAvailSize || state != USBCDCD_STATE_IDLE) {
return (0);
}
else if (bufAvailSize < length) {
/* Write largest multiple of 4 bytes */
length = bufAvailSize - (bufAvailSize % 4);
}
/* Place the contents into the USB BUffer */
return (USBBufferWrite(&txBuffer, pStr, length));
}
TASKSTATUS
UsbTxTaskMgr(UsbTxTask *pusbobj)
{
uint32_t ulSpace, ulWriteIndex;
tUSBRingBufObject sTxRing;
uint8_t i;
USBBufferInfoGet(&g_sTxBuffer, &sTxRing);
ulSpace = USBBufferSpaceAvailable(&g_sTxBuffer);
if (ulSpace < pusbobj->Len)
return TASKSTS_ONGOING;
ulWriteIndex = sTxRing.ui32WriteIndex;
for (i=0; i<pusbobj->Len; i++) {
g_pui8USBTxBuffer[ulWriteIndex++] = *(pusbobj->pBuf + i);
ulWriteIndex = (ulWriteIndex == BULK_BUFFER_SIZE) ? 0 : ulWriteIndex;
}
USBBufferDataWritten(&g_sTxBuffer, pusbobj->Len);
free(pusbobj->pBuf);
pusbobj->MemProd--;
ASSERT(pusbobj->MemProd == 1);
free(pusbobj);
return TASKSTS_FINISH;
}
//*****************************************************************************
//
// Writes a character to the USB interface.
//
//*****************************************************************************
void
USBIFWrite(unsigned char ucChar)
{
//
// Delay until there is some space in the output buffer.
//
while(g_bUSBConnected)
{
if(USBBufferSpaceAvailable(&g_sTxBuffer) != 0)
{
break;
}
}
//
// If there is still a USB connection, write this character into the output
// buffer.
//
if(g_bUSBConnected)
{
USBBufferWrite(&g_sTxBuffer, &ucChar, 1);
}
}
//*****************************************************************************
//
// Receive new data and echo it back to the host.
//
// \param psDevice points to the instance data for the device whose data is to
// be processed.
// \param pi8Data points to the newly received data in the USB receive buffer.
// \param ui32NumBytes is the number of bytes of data available to be processed.
//
// This function is called whenever we receive a notification that data is
// available from the host. We read the data, byte-by-byte and swap the case
// of any alphabetical characters found then write it back out to be
// transmitted back to the host.
//
// \return Returns the number of bytes of data processed.
//
//*****************************************************************************
static uint32_t
EchoNewDataToHost(tUSBDBulkDevice *psDevice, uint8_t *pi8Data,
uint_fast32_t ui32NumBytes)
{
uint_fast32_t ui32Loop, ui32Space, ui32Count;
uint_fast32_t ui32ReadIndex;
uint_fast32_t ui32WriteIndex;
tUSBRingBufObject sTxRing;
//
// Get the current buffer information to allow us to write directly to
// the transmit buffer (we already have enough information from the
// parameters to access the receive buffer directly).
//
USBBufferInfoGet(&g_sTxBuffer, &sTxRing);
//
// How much space is there in the transmit buffer?
//
ui32Space = USBBufferSpaceAvailable(&g_sTxBuffer);
//
// How many characters can we process this time round?
//
ui32Loop = (ui32Space < ui32NumBytes) ? ui32Space : ui32NumBytes;
ui32Count = ui32Loop;
//
// Update our receive counter.
//
g_ui32RxCount += ui32NumBytes;
//
// Dump a debug message.
//
DEBUG_PRINT("Received %d bytes\n", ui32NumBytes);
//
// Set up to process the characters by directly accessing the USB buffers.
//
ui32ReadIndex = (uint32_t)(pi8Data - g_pui8USBRxBuffer);
ui32WriteIndex = sTxRing.ui32WriteIndex;
while(ui32Loop)
{
//
// Copy from the receive buffer to the transmit buffer converting
// character case on the way.
//
//
// Is this a lower case character?
//
if((g_pui8USBRxBuffer[ui32ReadIndex] >= 'a') &&
(g_pui8USBRxBuffer[ui32ReadIndex] <= 'z'))
{
//
// Convert to upper case and write to the transmit buffer.
//
g_pui8USBTxBuffer[ui32WriteIndex] =
(g_pui8USBRxBuffer[ui32ReadIndex] - 'a') + 'A';
}
else
{
//
// Is this an upper case character?
//
if((g_pui8USBRxBuffer[ui32ReadIndex] >= 'A') &&
(g_pui8USBRxBuffer[ui32ReadIndex] <= 'Z'))
{
//
// Convert to lower case and write to the transmit buffer.
//
g_pui8USBTxBuffer[ui32WriteIndex] =
(g_pui8USBRxBuffer[ui32ReadIndex] - 'Z') + 'z';
}
else
{
//
// Copy the received character to the transmit buffer.
//
g_pui8USBTxBuffer[ui32WriteIndex] =
g_pui8USBRxBuffer[ui32ReadIndex];
}
}
//
// Move to the next character taking care to adjust the pointer for
// the buffer wrap if necessary.
//
ui32WriteIndex++;
ui32WriteIndex =
(ui32WriteIndex == BULK_BUFFER_SIZE) ? 0 : ui32WriteIndex;
ui32ReadIndex++;
ui32ReadIndex = (ui32ReadIndex == BULK_BUFFER_SIZE) ? 0 : ui32ReadIndex;
ui32Loop--;
}
//
// We've processed the data in place so now send the processed data
// back to the host.
//
USBBufferDataWritten(&g_sTxBuffer, ui32Count);
DEBUG_PRINT("Wrote %d bytes\n", ui32Count);
//
// We processed as much data as we can directly from the receive buffer so
// we need to return the number of bytes to allow the lower layer to
// update its read pointer appropriately.
//
return(ui32Count);
}
//*****************************************************************************
//
// Read as many characters from the UART FIFO as we can and move them into
// the CDC transmit buffer.
//
// \return Returns UART error flags read during data reception.
//
//*****************************************************************************
static int32_t
ReadUARTData(void)
{
int32_t i32Char, i32Errors;
uint8_t ui8Char;
uint32_t ui32Space;
//
// Clear our error indicator.
//
i32Errors = 0;
//
// How much space do we have in the buffer?
//
ui32Space = USBBufferSpaceAvailable((tUSBBuffer *)&g_sTxBuffer);
//
// Read data from the UART FIFO until there is none left or we run
// out of space in our receive buffer.
//
while(ui32Space && ROM_UARTCharsAvail(USB_UART_BASE))
{
//
// Read a character from the UART FIFO into the ring buffer if no
// errors are reported.
//
i32Char = ROM_UARTCharGetNonBlocking(USB_UART_BASE);
//
// If the character did not contain any error notifications,
// copy it to the output buffer.
//
if(!(i32Char & ~0xFF))
{
ui8Char = (uint8_t)(i32Char & 0xFF);
USBBufferWrite((tUSBBuffer *)&g_sTxBuffer,
(uint8_t *)&ui8Char, 1);
//
// Decrement the number of bytes we know the buffer can accept.
//
ui32Space--;
}
else
{
#ifdef DEBUG
//
// Increment our receive error counter.
//
g_ui32UARTRxErrors++;
#endif
//
// Update our error accumulator.
//
i32Errors |= i32Char;
}
//
// Update our count of bytes received via the UART.
//
g_ui32UARTRxCount++;
}
//
// Pass back the accumulated error indicators.
//
return(i32Errors);
}
//*****************************************************************************
//
// Receive new data and echo it back to the host.
//
// \param psDevice points to the instance data for the device whose data is to
// be processed.
// \param pcData points to the newly received data in the USB receive buffer.
// \param ulNumBytes is the number of bytes of data available to be processed.
//
// This function is called whenever there is data available from the host. The
// data is read byte-by-byte, the case of any alphabetical characters is
// swapped, and then it is written back out to be transmitted back to the host.
//
// \return Returns the number of bytes of data processed.
//
//*****************************************************************************
static unsigned long
EchoNewDataToHost(tUSBDBulkDevice *psDevice, unsigned char *pcData,
unsigned long ulNumBytes)
{
unsigned long ulLoop, ulSpace, ulCount;
unsigned long ulReadIndex;
unsigned long ulWriteIndex;
tUSBRingBufObject sTxRing;
//
// Get the current buffer information to allow us to write directly to the
// transmit buffer (there is already have enough information from the
// parameters to access the receive buffer directly).
//
USBBufferInfoGet(&g_sTxBuffer, &sTxRing);
//
// How much space is there in the transmit buffer?
//
ulSpace = USBBufferSpaceAvailable(&g_sTxBuffer);
//
// How many characters can be processed this time round?
//
ulLoop = (ulSpace < ulNumBytes) ? ulSpace : ulNumBytes;
ulCount = ulLoop;
//
// Update our receive counter.
//
g_ulRxCount += ulNumBytes;
//
// Set up to process the characters by directly accessing the USB buffers.
//
ulReadIndex = (unsigned long)(pcData - g_pucUSBRxBuffer);
ulWriteIndex = sTxRing.ulWriteIndex;
//
// Copy from the receive buffer to the transmit buffer converting character
// case on the way.
//
while(ulLoop--)
{
//
// Is this a lower case character?
//
if((g_pucUSBRxBuffer[ulReadIndex] >= 'a') &&
(g_pucUSBRxBuffer[ulReadIndex] <= 'z'))
{
//
// Convert to upper case and write to the transmit buffer.
//
g_pucUSBTxBuffer[ulWriteIndex] =
(g_pucUSBRxBuffer[ulReadIndex] - 'a') + 'A';
}
else
{
//
// Is this an upper case character?
//
if((g_pucUSBRxBuffer[ulReadIndex] >= 'A') &&
(g_pucUSBRxBuffer[ulReadIndex] <= 'Z'))
{
//
// Convert to lower case and write to the transmit buffer.
//
g_pucUSBTxBuffer[ulWriteIndex] =
(g_pucUSBRxBuffer[ulReadIndex] - 'Z') + 'z';
}
else
{
//
// Copy the received character to the transmit buffer.
//
g_pucUSBTxBuffer[ulWriteIndex] = g_pucUSBRxBuffer[ulReadIndex];
}
}
//
// Move to the next character taking care to adjust the pointer for
// the buffer wrap if necessary.
//
ulWriteIndex++;
ulWriteIndex = (ulWriteIndex == BULK_BUFFER_SIZE) ? 0 : ulWriteIndex;
ulReadIndex++;
ulReadIndex = (ulReadIndex == BULK_BUFFER_SIZE) ? 0 : ulReadIndex;
}
//
// The data has been processed in place so now send the processed data back
// to the host.
//
USBBufferDataWritten(&g_sTxBuffer, ulCount);
//
// Return the number of bytes processed to allow the bulk device driver to
// update its read pointer appropriately.
//
return(ulCount);
}
